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 H-Buffer in a carbine question?
McGruff1533  [Member]
11/30/2011 4:43:02 PM
Mods, please move this thread to the appropriate location if it does not belong here.

Everyone, I have a DPMS AR-15 rifle that I put together a couple years ago to serve as my patrol rifle. It's your basic DPMS with a 16" barrel, carbine length gas system, adjustable stock and A2 flash suppressor. It functions 100%, and has a 2:00-4:00 ejection pattern depending on ammo selection. However, after picking up a second AR15, I began to notice some things about the DPMS that were not present on my new Del-Ton middy build.

I'm not sure if it's the weight of the Del-Ton with heavy barrel, Yankee Hill Phantom compensator/ muzzle brake, and Heavy Buffer, but I can honestly say the Del-Ton recoils much more softly and is more of a gentle push rather than a jolt with the DPMS.

While shooting the DPMS, the recoil is more pronounced and not nearly as soft as the new Del-Ton which has an H-Buffer compared to a standard buffer in the DPMS.

So, heres the question... would swapping my DPMS standard buffer over to an H-Buffer do anything to smooth out the recoil impulse? Also, would adding the heavier buffer do anything to improve my ejection pattern to a more appropriate 3:00 to 4:30 area?

And for the record, I did search this topic but came up with very little useful information.
RedFalconBill  [Team Member]
11/30/2011 5:06:45 PM
Yes, going up to a heavier buffer will take away a bit of the sharpness in the recoil.

When firing nothing but military rounds (M-193/M-855/MK-262) I go up to the H2 buffer.

The H buffer is the best balance between firing .223 ammo and 5.56 ammo.

The 3:00 to 4:30 ejection pattern is for carbine gas AR's firing M-193/M-855 ammo.

If you are not a member, then the search function, IMO, sucks.
peasant  [Member]
11/30/2011 5:42:46 PM
A heavier buffer may not be a good idea. Following the conventional wisdom, I put one in a Frankenbuild and had feeding problems. 14.5" barrel w/ permed long FS. Rounds would hang up before getting into the chamber. Tried a bunch of mags thinking that was the problem. Ammo was Wolf because the gun was my blaster. I also want my guns to shoot anything I put in them. Since going back to a standard buffer- no problem! YMMV.
McGruff1533  [Member]
11/30/2011 5:52:50 PM
Originally Posted By peasant:
A heavier buffer may not be a good idea. Following the conventional wisdom, I put one in a Frankenbuild and had feeding problems. 14.5" barrel w/ permed long FS. Rounds would hang up before getting into the chamber. Tried a bunch of mags thinking that was the problem. Ammo was Wolf because the gun was my blaster. I also want my guns to shoot anything I put in them. Since going back to a standard buffer- no problem! YMMV.



Thanks for the info. I'm thinking I'll pull the H-Buffer from my Del-Ton middy rifle and swap it into my DPMS to see how it runs. If it's a no-go, I'll put it back in the Del-Ton and forget about it. At least that way I'm not out any money for trying. If it runs fine, and reduces the sharp recoil, I'll buy another H-Buffer and keep the standard unit as a spare or use it in a different build.


RedFalconBill  [Team Member]
11/30/2011 6:20:09 PM

Originally Posted By peasant:
A heavier buffer may not be a good idea. Following the conventional wisdom, I put one in a Frankenbuild and had feeding problems. 14.5" barrel w/ permed long FS. Rounds would hang up before getting into the chamber. Tried a bunch of mags thinking that was the problem. Ammo was Wolf because the gun was my blaster. I also want my guns to shoot anything I put in them. Since going back to a standard buffer- no problem! YMMV.

You were running WOLF.

Use a carbine buffer with that crap. With real ammo, use a heavier buffer.

You would run into problems if you had an M-4, or M-4A1.
StagArmslower  [Team Member]
11/30/2011 8:12:58 PM
Middy barrel will shoot softer even with car buffer.
McGruff1533  [Member]
12/1/2011 7:18:34 AM
Originally Posted By StagArmslower:
Middy barrel will shoot softer even with car buffer.


Thats the exact reason why my last build was a heavy barreled 16" Middy. It's hard to quantify the reduction in recoil, but I'd have to say it's significantly less than my pencil barreled DPMS with it's carbine gas system.

I will shoot the DPMS today with the Carbine buffer, and then immediately switch to the H-Buffer to determine if it shoots any smoother. If it works, I'll order a separate H-Buffer and keep the Carbine unit as a spare.


UPDATE: I shot the Heavy Buffer in my DPMS this morning with a variety of ammunition ranging from steel cased Hornady 55 gr FMJ, XM193 and some 68 grain OTM stuff. Everything functioned normally. Ejection was right around 3:00 and I didn't notice any difference in the recoil impulse. Looks like I'll be sticking with the carbine buffer, since there was zero net change with the heavy buffer.